New England Patriots linebacker Brandon Spikes has been suspended four games for violating the NFL's banned substance policy, according to Sporting News correspondent and Boston Herald beat reporter Ian R. Rapoport.

Rapoport reports it's not clear what Spikes ingested but he was told "it is not a steroid." Also, according to the report, Spikes will not appeal the suspension.

New England Patriots linebacker Brandon Spikes has reportedly been suspended for four games for violating the NFL’s banned substance policy. (AP Photo) AP

Spikes released a statement, as published on the official Patriots' Twitter page:

"I've been contacted by the NFL and informed that I will be suspended 4 games for the detection of an illegal substance in a drug test. The substance was a medication that I should have gotten clarification on before taking. It was not a performance enhancer or an illegal drug. The integrity of the game is very important to me. I understand the league's ruling and apologize to my teammates, the fans and the Patriots organization for this mistake."

Spikes, a rookie out of Florida who was drafted in the second round, has played in 12 games for the Patriots this season. He has 61 tackles and one interception.

His suspension begins with Week 14's game against the Chicago Bears. Spikes will be eligible for the NFL playoffs.

With Spikes out, the Patriots likely will turn to Gary Guyton as his replacement. Guyton has primarily been used in passing situations but has played as needed.